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The resistance of a moving coil galvanom...

The resistance of a moving coil galvanometer is `20 Omega` . If requires 0.01 ampere current for full scale deflection. The value of resistance to convert in into a voltmeter of range 20 volt will be

A

` 198 Omega`

B

`1980 Omega`

C

`20 Omega`

D

`0 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
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MOTION-Electrical Instrument -EXERCISE -1
  1. A galvanometer of resistance 100Omega gives full deffection for a curr...

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  2. The deflection in a galvanometer fulls from 50 divisions to 20 divisio...

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  3. The resistance of a moving coil galvanometer is 20 Omega . If requires...

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  4. A galvanometer has a resistance of G ohm and range of V volt. Calculat...

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  5. The deflection of a moving coil galvanometer reduces to half on shunti...

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  6. When the current flowing in a galvanometer is (1/n) of the total curre...

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  7. A galvanometer can be converted into a voltmeter by connecting a

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  8. In every experiment with potentiometer in the null point state, the po...

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  9. The specific resistance per unit area of cross section of a wire is eq...

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  10. If the length of the potentiometer wire is doubled, the sensitivity fo...

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  11. The potential gradient of the potentiometer wire depends on

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  12. The potentiometer wire is replaced by another wire whose length thickn...

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  13. If the current in a potentiometer increases, the position of the null ...

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  14. The length of a potentiometer wire is 10m and a potential difference o...

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  15. As is the cross sectional area and rho is the specific resistance of a...

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  16. Potentiometer is an ideal instrument because

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  17. A potentiometer works on the principle that

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  18. If the length of potentiometer wire is increased, then the accuracy in...

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  19. In an ammeter calibration experiment, the potentiometer is used to mea...

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  20. In potentiometer the potential gradient is –

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